Obsidian Charizard currently undervalued?

Most sets with a main Charizard card seem like a fairly reliable investment long term. Ungraded Obsidian Charizard is going for way less than its more popular Paldean Fates counterpart. Do you think Obsidian Flames is worth investing in rn? I picked up a couple ungraded copies, seem fairly undervalued rn. Can you see the Obsidian Charizard picking up in value?